program 9

Create multiple histogram using ggplot2::facet_wrap() to visualize how a variable is distributed to different groups in a built-in R dataset.

step1:load the librarys

library(ggplot2)

step2:load the in-built dataset

data(iris)
head(iris)

  Sepal.Length Sepal.Width Petal.Length Petal.Width Species
1          5.1         3.5          1.4         0.2  setosa
2          4.9         3.0          1.4         0.2  setosa
3          4.7         3.2          1.3         0.2  setosa
4          4.6         3.1          1.5         0.2  setosa
5          5.0         3.6          1.4         0.2  setosa
6          5.4         3.9          1.7         0.4  setosa

step3:creating histogram layer

ggplot(iris , aes(x= Sepal.Length))+
  geom_histogram(binwidth = 0.3 ,fill = "skyblue",color ="black")+
  facet_wrap(~Species)+
  labs(title="distribution of sepal length by species",
       x = "sepal length(cm)",
       y = "frequency")+
       theme_minimal()